The Snyder Industries 6500 Gallon 30 Degree Plastic Cone Bottom Tank (SKU SII-7180000N45) is a full-drain industrial vessel built for chemical service. Molded in white polyethylene by Snyder Industries, it stands 273" tall on a 90" x 90" footprint and carries a 1.9 specific gravity rating - the resin and wall thickness are engineered to hold heavy liquids well above the density of water. The 30-degree cone bottom drives solids and sediment toward a single low drain point, which is why operators searching for a true cone bottom tank, cone tank, or Snyder cone reach for this design over a flat-bottom vertical.
Will it work for your application?
At 6,500 gallons nominal, plain water alone weighs roughly 54,210 lb when the tank is brimming. The 1.9 SG rating means full contents can reach about 102,999 lb at the maximum rated density - nearly double a water-filled tank. That is the single most expensive detail on this size: the cone-support stand and the slab beneath it have to be engineered for ~103,000 lb of loaded mass, and most off-the-shelf cone stands are not rated that high. Spec the structure first, then the tank. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm your liquid's density falls inside the 1.9 rating before you order; 1.9 SG is the maximum-density rating offered at this size, so there is no heavier-rated version to step up to. The tank ships with a flange, an 18" PE threaded/vented fitting, and a manway with 15" access for entry, gauging, and cleanout. Because a cone bottom tank must be fully supported off the ground, review the Cone Bottom Tank Stand Compatibility Matrix and, if you are weighing cone angles, the cone bottom tank buyer's guide on 15- vs 30- vs 45-degree selection.
Chemical compatibility
This is a polyethylene tank with a 1.9 SG rating. Confirm whether your unit is HDLPE or XLPE before committing it to chemical service - that resin distinction changes long-term resistance, and it should be verified against the OEM spec rather than assumed. All pairings below are concentration- and temperature-specific, so verify your exact operating concentration and temperature against the OEM chemical-resistance chart before ordering. Within the 1.9 SG rating, this vessel is compatible with: Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS fittings, EPDM) - a common choice for diesel exhaust fluid storage - Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Magnesium Chloride (30%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Phosphoric Acid (85%, PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (<16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Sulfuric Acid (98%, CPVC, Viton), Urea Solution (50%, PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). These fitting and gasket pairings apply to the hardware you install at the tank's penetrations - the bare tank as shipped is not pre-fitted for any specific chemical, so the 18" PE fitting, flange, and manway must be outfitted to the materials listed for your service. For full lookups across concentrations, use our Chemical Compatibility Database.
The mistake to avoid
The costliest compatibility error on a 1.9 SG cone bottom tank is mixing the wrong elastomer into an aggressive service. Several oxidizers and strong acids here - Hydrochloric, Phosphoric, Hydrofluoric, Sulfuric, Hydrogen Peroxide, Peracetic, and Sodium Hypochlorite - call for Viton or Aflas gaskets and PVC, CPVC, or 316SS hardware, not the default EPDM that suits the salts and glycols. Installing EPDM on a Viton-spec acid line is how a tank that is otherwise perfectly compatible ends up with a leaking flange. Many of those same services - sulfuric, HCl, sodium hypochlorite - also carry SPCC secondary-containment obligations, so plan the containment before the install and see our Snyder Captor 110% containment vs UL-142/SPCC comparison. Confirm the resin (HDLPE vs XLPE), confirm your concentration, and confirm the fitting/gasket pairing for each penetration before you fill. See the technical drawing on this page for fitting placement and the manway location.
This tank ships LTL freight from Snyder Industries in Lincoln, Nebraska, with freight quoted live to your ZIP code. Get a real number now with our Freight Cost Estimator, or call 866-418-1777 to lock in delivery and confirm chemical-service fittings for your install.
